// 用 ws 库实现的假机器人，仅用于本地验证 robot-ctl.js 的帧格式
const { WebSocketServer } = require('/root/.local/share/pnpm/global/5/.pnpm/ws@8.21.3/node_modules/ws');
const port = Number(process.argv[2] || 8905);
const wss = new WebSocketServer({ port, host: '127.0.0.1' });
let n = 0;
wss.on('connection', (ws) => {
  console.log('CONNECTED');
  ws.on('message', (buf) => {
    n++;
    const txt = buf.toString();
    console.log('FRAME#' + n, txt);
    ws.send(JSON.stringify({ ok: true, n, echo: JSON.parse(txt) }));
  });
});
console.log('fake robot ws on', port);